Company email (September 2014):
"There are no animal products used in the making of Knob Creek."

Company email:
"Thank you contacting Beam Global Spirits & Wine. We always like to hear from our consumers.
Our products are not made with any animal or fish products; however, it is filtered with diatomaceous earth which may contain microscopic animal skeletons, and carbon from coal which may also have been exposed to prehistoric animal parts. By strict standards, our products should be avoided by Vegans, unless the above filtration materials are acceptable.
I hope this helps answer your question."

Company email:
Our products are not made with any animal or fish products; however, it is filtered with diatomaceous earth which may contain microscopic animal skeletons, and carbon from coal which may also have been exposed to prehistoric animal parts. By strict standards, our products should be avoided by Vegans, unless the above filtration materials are acceptable. [ed: OK, a little cheeky, but we'll give it a pass]